Overview
integrated intelligent load switch launched by ON Semiconductor , designed for high-efficiency power management and overcurrent protection . The device integrates low on-resistance (RON), overcurrent limit, short circuit protection, thermal shutdown and other functions, and can be widely used in smart phones, portable electronic devices, embedded systems and industrial power management to ensure the safety and stability of power supply.

Specifications
parameter | Numeric |
Input voltage range | 1.2V to 5.5V |
Maximum load current | 2A |
On-resistance (RON) | 55mΩ (typical) |
Over Current Protection (OCP) | 2.3A current limit (typical) |
Short circuit protection | support |
Thermal Shutdown (TSD) | 140°C (typical) |
Soft Start | built-in |
Shutdown current | <1µA |
Package Type | 4-pin MicroFET (1mm x 1.5mm) |
Operating temperature range | -40°C to +85°C |
FPF2700MPX’s outstanding features
Ultra-low on-resistance (RON)
55mΩ RON design can effectively reduce power consumption and improve power efficiency, suitable for low voltage and high current applications .
Integrated over-current protection (OCP)
Equipped with 3A current limiting function to prevent system damage due to sudden load changes or short circuits.
Short circuit and thermal protection (TSD)
of 140°C prevents the device from overheating, ensuring long-term reliable operation.
Soft start function
Built-in slow start circuit can effectively reduce surge current and avoid impact on power supply and load.
Very low static power consumption
The shutdown current is less than 1µA , which is suitable for battery-powered systems and low-power devices to extend battery life.
Compact package (MicroFET 1mm x 1.5mm)
Suitable for high-density PCB design , saving space and meeting the needs of portable electronic products.
Application Areas
FPF2700MPX is widely used in the following fields due to its small size, high efficiency and multiple protection mechanisms :
Smartphones and tablets
As a power switch, it protects USB ports and battery management ICs from overcurrent damage.
Internet of Things (IoT) Devices
Used in wireless sensors and low-power smart devices to ensure stable power management.
Embedded Systems
Provides safe power switching and management in microcontrollers (MCUs), FPGAs, and single-board computers (SBCs) .
Wearable devices
Suitable for smart watches, fitness trackers, Bluetooth headsets , optimize battery management and reduce power consumption.
Industrial Automation
Applicable to PLC controllers and intelligent instruments to ensure stable power supply and avoid system failures caused by short circuit or overcurrent.
Comparative Analysis: FPF2700MPX vs. Other Load Switches
Features/Specifications | FPF2700MPX | Other load switches in the market |
Input voltage range | 1.2V – 5.5V | 1.8V – 5.5V |
Maximum output current | 2A | 1A – 3A |
On-resistance (RON) | 55mΩ | 80mΩ – 150mΩ |
Overcurrent protection | 2.3A current limit | Partial support |
Short circuit protection | yes | Partial support |
Thermal shutdown protection | 140°C | 125°C – 150°C |
Package size | 1mm x 1.5mm MicroFET | SOT23, QFN |
The FPF2700MPX has significant advantages in low on-resistance, compact packaging, low power consumption and comprehensive protection functions , making it an ideal choice for high-performance power management .
Manufacturer introduction: ON Semiconductor
ON Semiconductor is a leading global supplier of power management and semiconductor solutions , dedicated to providing high-performance, low-power power management ICs. As one of its intelligent load switch series , FPF2700MPX is widely used in consumer electronics, embedded systems and industrial applications with its efficient, compact and reliable design .
Why choose FPF2700MPX?
Low RON (55mΩ) improves efficiency and reduces energy consumption
● 2.3A overcurrent protection ensures safe operation of the load
● Short circuit & over-temperature protection improves device reliability
● Soft start function reduces the impact of inrush current on the system
● Extremely low static power consumption (<1µA) for low-power devices
● Ultra-small MicroFET package (1mm x 1.5mm) for compact designs
FPF2700MPX is suitable for high-density electronic devices such as smartphones, IoT, wearable devices, industrial control, etc., providing efficient, safe and stable solutions for modern power management.
FAQ
Q1: Does FPF2700MPX support power supply above 5V?
A: The input voltage range of this device is 1.2V – 5.5V, and it does not support voltage applications above 5.5V. In order to ensure safe and stable operation of the device, it is recommended to select ON Semiconductor load switches with higher voltage ratings to meet power supply requirements above 5.5V, avoid exceeding the maximum rated voltage of the device, and ensure system reliability and protection.
Q2: Is it suitable for USB port protection?
A: Yes, the FPF2700MPX has a 2.3A current limit protection function, which can be used for current management and overcurrent protection of USB ports. It can effectively prevent short circuits or device damage caused by excessive current. In addition, the device also supports overtemperature protection function, which helps ensure that the USB port remains stable and safe during long-term use.
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